"Captain Jack is the Face of Boe. Captain Jack cannot die. Captain Jack was once a Time Agent, or pretends to be one. Captain Jack wears a vortex manipulator. Dorium Maldovar sold River a vortex manipulator “fresh off the wrist of a handsome Time Agent.” Dorium Maldovar works with the Headless Monks from time to time. The Headless Monks decapitate people. The Face of Boe is a head with no body." this is the brilliant logic of the person who pinned before me... never would have thought of it.

"Something just hit me. So in Torchwood when they blew jack up he grew back out of what they found. Well, when the headless monks cut his head off his head survives and becomes the face of boe which eventually dies, but Jack can’t die bc of Rose which means, that from the rest of his body a new head grew and there has to be another jack out there….." - angel-in-the-blue-box via Tumblr

This quote is from 'Gridlock'. The Face of Boe is in 'Gridlock'. It's all falling into place. - Captain Jack is The Face of Boe. - Doriam Maldovar sold River the vortex manipulator 'fresh off the wrist of a handsome time agent'. - Doriam Maldover had dealings with the Headless Monks. - The Headless Monks de-capitate people and put their living heads in boxes. - The fumes in New Earth can make a head gigantic.